DA9021 datasheet(103/142 Pages) DIALOG

103 / 142 page

DA9021/22

System PMIC with high efficiency USB power manager

Datasheet

Revision 2.5

17-Feb-2017

CFR0011-120-00 Rev 5

103 of 142

19 Programmable battery charger

The system power and charger control block contains the following functions:

● 2-way power path switch with automatic selection of the system power source (VDDOUT) from

either VBUS or VBAT. Battery disconnection switch to allow Instant-On system start-up with

discharged main battery

● Embedded active diode and external active diode controller provide a low loss power path

seamless switching in whenever input power is limited or unavailable

● VBAT tracking switching regulator supplying system power out of USB port with an efficiency >

85 % @ 1000 mA load current

● Full featured autonomous Li-Ion/Polymer battery charger with pre-configurable current limits and

programmable EOC voltages (4.1 V to 4.4 V), current monitoring (always active when charger is

on) and OTP programmable EOC currents. Integrated control over battery pre-charge (including

battery pack wakeup), Constant-Current and Constant-Voltage charging phases

● Automatic charge current reduction via Dynamic Charger Current Control (DCCC), maintaining

VDDOUT system power at minimum 3.5 V without exceeding the supply current limits. Individual

programmable current limits for the USB supply input

● Automatic USB Battery Charging, Specification Rev.1.0 compliant charger type detection, USB

SUSPEND mode support

● Battery temperature qualified charging (using GP-ADC) with default threshold settings loaded

from OTP

● Battery charging termination by current (using GP-ADC) with default threshold setting loaded

from OTP

● Extended battery life by protection against continuous top charging (configurable re-charge

hysteresis)

● Thermal limiting of charge current by IC temperature (using GP-ADC)

● Programmable charge termination by timer for safety

DA9021 Datasheet(PDF) 103 Page - Dialog Semiconductor